A guy transferred for work to a city very far from his home so he had to rent a house to live. Finally, he found a house that he liked, a two-story house and he lived on the upper floor, and on the lower floor was a young couple about his age living. One day the house lost power, so he walked downstairs to get some fresh air and met Amakawa Sora and his wife. He accidentally saw them making love on the floor and clearly saw his wife's beautiful body. That afternoon when the husband was away, he sneaked down to where his wife was sleeping and slowly touched her all over her body.